JPS64441Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an underwater input guide tube for dropping underwater input.

Conventional underwater input guide tubes generally consist of a simple tube that guides input materials such as earth and sand into the tube and allows them to fall to the bottom of the water.

However, conventional guide tubes have the problem that when guiding input materials to the bottom of the water, they do not fall smoothly, and the tubes become clogged with input materials such as earth and sand.
When the sediment that has fallen through the pipe is discharged from the lower end of the pipe into the water or the water bottom, air bubbles mixed in the sediment inside the pipe are released into the water, kicking up the sediment and polluting the nearby water area.

This problem needs to be resolved quickly, especially since there are fishing grounds at sea.

The purpose of the present invention is to provide an improved underwater input guide tube that can overcome the above problems.

This invention is a guide pipe for guiding input material such as earth and sand, aggregate, etc. used for foundation work of underwater structures and covering work of underwater piping, etc. to a predetermined depth underwater. An opening is made in the middle or lower end of the guide tube.
At least one stationary or rotating buffer plate is provided.

Note that "underwater" in this invention refers to the ocean, rivers, lakes, and marshes.

Hereinafter, the present invention will be specifically explained with reference to the drawings.

1 to 3 are side sectional views of guide tubes according to embodiments of the present invention, and FIG. 9 is an enlarged perspective view of the vicinity of their openings. and the fourth
7 to 7 are plan views of various buffer plates, and FIG. 8 is a side sectional view of the vicinity of the rotary buffer plate.

In FIG. 1, a guide tube 1 for underwater inputs with a buffer plate is composed of a guide tube main body 2 for guiding underwater inputs to a predetermined water depth, and a buffer plate 3 provided in the middle part of the guide tube body 2. ing. Also,
The guide tube main body 2 has a hopper 4 at its top, and has a plurality of openings 5 in the circumferential direction at locations corresponding to the water surface W, and near the openings 5, the guide tube main body 2
It has a slide tube 6 that can be slid in the longitudinal direction of the tube along the outer periphery of the tube, and this slide tube 6
A pollution prevention tube 7 is provided on the outer periphery of the tube so as to shield the opening 5.

Next, the function of the underwater input guide tube 1 with a buffer plate of the present invention will be explained.

Now, the above guide pipe 1 is removed from the work boat (not shown).
Suppose that it is submerged in water and set as shown in Figure 1.

In this state, the inside of the guide tube main body 2 is filled with water up to the water surface level. Therefore, when earth and sand are thrown in from the hopper 4 of the guide tube body 2, the earth and sand fall inside the guide tube body 2, but when a large amount of earth and sand is thrown in and dropped, the earth and sand seals the inside of the guide tube body 2. As the guide tube body 2 falls, the earth and sand absorb the water and descend, thereby lowering the water level within the guide tube body 2. Thus, if more earth and sand are added, a water shortage will occur, and the earth and sand will become clogged in the guide tube body 2. However, in the present invention, the guide tube body 2
Since a large number of openings 5 are bored at the water surface position, water from outside flows into the openings 5 as the water level inside the guide tube main body 2 decreases as described above, and the water is used to prevent the above-mentioned clogging of earth and sand. It acts as a lubricant, allowing dirt to fall smoothly without clogging.

Water outside the tube passes through the gap between the pollution prevention tube 7 and the guide tube body 2 and flows into the guide tube body 2 from the opening 5, so the slide tube 6 can be moved up or down along the guide tube body 2. By sliding it, the opening area of the opening 5 below the water surface W can be changed, and the amount of water flowing into the pipe can be adjusted.
As a result, the speed of the earth and sand falling within the guide tube main body 2 can be controlled.

Input material such as earth and sand that has fallen through the pipe collides with the buffer plate 3 provided in the middle of the guide pipe main body 2 and is crushed, releasing air bubbles mixed in the earth and sand into the pipe and closing the opening. 5 and hopper 4 into the atmosphere.

Furthermore, when the earth and sand collide with the buffer plate 3, a part of the falling kinetic energy that it has is absorbed by the buffer plate 3, and its momentum is weakened. Therefore, the falling speed is controlled and the impact force when the earth and sand reaches the lower end of the pipe and is discharged to the water bottom is reduced, so that the spread of pollution can be suppressed.
At this time, since the opening 5 is formed in the guide tube 1, the guide tube will not be clogged even if a buffer plate is provided.

The buffer plate 3 is not only provided in the middle part of the guide tube main body 2 as shown in FIG. It can be provided in the middle part and the lower end part.

Furthermore, as shown in FIG. 3, if a pollution diffusion prevention cover 8 is provided at the lower end of the guide tube main body 2, the effect of inhibiting pollution diffusion by the buffer plate 3 at the intermediate part and the buffer plate 3' at the lower end can be improved. It can be further strengthened. In addition, it is preferable that the portion of the guide tube main body 2 where the buffer plate 3 is provided is wider than the other portions as shown in FIGS. 1 to 3.

As the buffer plates 3, 3', for example, stationary type buffer plates 3a to 3d as shown in FIGS. 4 to 7, or rotating type buffer plates 3e as shown in FIG.
can be used.

To explain each, flat plate-shaped 3a (Fig. 4),
3b with a diamond-shaped cross section (Fig. 5), 3c with 3b arranged in a cross shape (Fig. 6), and 3d with a lattice arrangement (7th
(Fig. 8), and a rotatably provided impeller-shaped 3e (Fig. 8). Also, if necessary, 3a to 3e
Other buffer plates may also be used. It does not matter the shape or structure, as long as it functions as a buffer plate.

As explained above, the present invention provides a large number of openings 5 at the water surface position of the guide tube body 2, and at least one stationary or rotating buffer plate is provided at the middle or lower end of the guide tube body. This has the following effects:

That is, first of all, as mentioned above, the introduced soil does not get clogged in the guide tube body and can be dropped smoothly, and furthermore, the input materials such as soil and sand falling down the guide tube body are prevented by the buffer plate. Since the pipe can be crushed by crushing it, air bubbles mixed in the earth and sand can be released into the pipe and released into the atmosphere from the upper part of the pipe and the opening. Therefore, like in conventional guide pipes, the air bubbles mixed in the sediment fall directly to the bottom end of the tube, and when they are released at the bottom end of the tube, the air bubbles released into the water stir up the sediment and spread into the nearby water area. The problem of contamination can be solved. This bubble release effect is particularly effective when the buffer plate is provided in the middle of the guide tube.

Furthermore, the kinetic energy of the earth and sand falling through the guide tube is partially absorbed when it collides with the buffer plate, and the impact force when it reaches the lower end of the tube and is released to the water bottom is reduced. Therefore, it is possible to prevent soil from spreading and polluting nearby water areas.

The effect of suppressing pollution diffusion can be achieved by providing a buffer plate at at least one location in the middle or lower end of the guide tube.
The effect will be further improved if pollution prevention pipes and pollution diffusion prevention covers are installed.

[Brief explanation of the drawing]

Figures 1 to 3 are side sectional views of a guide tube according to an embodiment of the present invention, Figures 4 to 7 are plan views of various types of buffer plates, and Figure 8 is a rotary type buffer plate. FIG. 9 is an enlarged perspective view of the vicinity of the opening shown in FIGS. 1 to 3. 1...Underwater input guide tube with buffer plate, 2...Guide tube body, 3, 3', 3a to 3e...Buffer plate,
5...Opening.

Claims (1)

[Scope of utility model registration request] In guide pipes for guiding materials such as earth and aggregate used for foundation construction of underwater structures and covering work for underwater piping to a specified depth underwater, an opening is provided near the water surface where the guide pipe is submerged. 1. An underwater input guide tube with a buffer plate, characterized in that the guide tube is bored and further provided with at least one stationary or rotating buffer plate at the middle or lower end of the guide tube.